Which one of the following complexes will have four isomers?
A. `[CoCl_(2)(en)(NH_(3))_(2)]Cl`
B. `[Co(NH_(3))_(2)Cl_(2)(PPh_(3))_(2)]Cl`
C. `[Co(en)_(3)]Cl_(3)`
D. `[CoCl_(2)(en)_(2)]Br`

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1 Answers

Correct Answer - D
The four isomers are ionisation isomers, cis and trans isomers. Cis isomer exists as two optical isomers (dextro and laevo).

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